Three types of anchoring brackets were tested under various load configurations: 1) Three NB1C brackets bolted to steel tube with six bolts. 2) Three NB1S brackets welded to steel tube with a through bolt and nut. 3) Three NB1C brackets lag screwed to stacked wood pieces. All brackets withstood proof loads up to 258 lbf without damage. Two brackets withstood ultimate loads of 588 and 562 lbf with minor deformation; the third withstood 631 lbf without issues. Aluminum attachment shoes initially failed and were replaced with steel angles.

1. INFORMATION CONTAINED HEREIN MAY BE SUBJECT TO EXPORT CONTROL LAWS. REFER TO INTERNATIONAL TRAFFIC IN ARMS REGULATION (ITAR)
OR THE EXPORT ADMINISTRATION REGULATION (EAR) OF 1979. IT IS THE RESPONSIBILITY OF THE RECIPIENT TO OBTAIN ANY REQUIRED LICENSES
TO EXPORT ANY CONTROLLED DATA.
10 November 2020
417541-99-02-L20-0775,
Revision A
Nill Building Solutions
67 Mariner Drive
Southampton, NY 11968
Attention: Mr. Christopher Gray
Subject: Proof and Ultimate Load Testing Performed on Nine Anchoring Brackets
References: (a) Purchase Order No. 053049
(b) Dayton T. Brown, Inc. Quote # 20-1496, dated 16 October 2020
(c) E-Mail Correspondence between D. Landwehrle of Dayton T. Brown, Inc.
and C. Gray of Nill Building Solutions, dated 30 October 2020
Enclosure: (1) Test Equipment List – 1 Page
(2) Photographs – 2 Pages
(3) Representative Proof Load Graphs – 3 Pages
Mr. Gray,
This test report details the events and calibrated test equipment used for the proof and ultimate load
testing of the two types of Anchoring Brackets in three configurations. The reason for this Revision
A is to describe how the Anchoring Brackets were supplied for testing and to in include
representative graphs as an enclosure. Three NB1C and three NB1S Anchoring Brackets were
supplied bolted to a section of 3/8-inch tube steel for testing. The NB1C steel configuration utilized
six 1.5-inch x ¼-20 bolts into tapped holes in the tube steel to secure the NB1C Anchoring Bracket.
No nuts were used on the back side of the tube steel. The NB1S steel configuration utilized a thru
hole at the center of the tube steel for a 7/8-9 bolt which was welded to the back side of the NB1S
Anchoring Bracket. A 7/8-9 nut was then used to secure the NB1S Anchoring Bracket from the back
side of the tube steel. Three NB1C were supplied affixed to two stacked pieces of wood using (6) 3-
inch x ¼-13 lag screws.
Testing was performed on 30 October 2020 under reference (a) to the requirements of references (b)
and (c). Proof load testing was performed by applying a 250-lbf lateral load, at a distance of 48
inches from the top surface of each Anchoring Bracket tested. The load was applied in 20%
increments up to at least 250 lbf as shown in graphs of Enclosure 3. Once the 250-lbf load was
reached, the load was then decreased in 20% increments. A visual inspection was performed after
each test which checked for any damage or deformation of the Anchoring Brackets. None of the
Anchoring Brackets showed evidence of damage, deformation, or failure of attachment after being
subjected to the proof load test, as summarized in the table below.

2. 20-0775A Pg 2
Ultimate load testing was performed by applying the largest lateral load possible, at a distance of 48
inches from the top surface of each Anchoring Bracket. For both tests, the load was applied through
a 1/2-inch steel panel. The panel was secured to the Unit Under Test (UUT) utilizing a piece of steel
90° angle.
The Anchoring Brackets were originally delivered with “aluminum shoes” to secure the steel panel
to the UUT. During the first proof load test of Serial No. NB1C-S-1, it was found that the aluminum
shoe was failing prematurely at approximately 164.3 lbf due to the aluminum material deforming
around the bolt that secures the shoe to the Anchoring Bracket. As the aluminum shoe was not part
of the UUTs, the shoes were removed from each Anchoring Bracket and replaced with the steel 90°
angle. Serial No. NB1C-S-1 showed no evidence of damage or deformation and was subjected to a
second proof load test utilizing the steel 90° angle.
Proof Load Test Results
Part No. Serial No.
Max Load
Applied (lbf)
Visual Damage/
Deformation
NB1C NB1C-S-1 254.7 None
NB1C NB1C-S-2 256.0 None
NB1C NB1C-S-3 256.4 None
NB1S NB1S-S-1 258.1 None
NB1S NB1S-S-2 255.5 None
NB1S NB1S-S-3 252.2 None
NB1C NB1C-W-1 252.8 None
NB1C NB1C-W-2 254.3 None
NB1C NB1C-W-3 254.5 None
Ultimate Load Test Results
Part No. Serial No.
Max Load
Applied (lbf)
Visual Damage/
Deformation
NB1C NB1C-W-3 588.5 Yes, see Note 1
NB1C NB1C-S-3 561.9 Yes, see Note 1
NB1S NB1S-S-3 631.0 None
Note 1: For Serial Nos. NB1C-S-3 and NB1C-W-3, there was concave shape deformation at the
center of the Anchoring Bracket while the anchoring screws remained secured. It was also noted that
the stainless steel bolt that secured the steel 90° angle to the Anchoring Bracket was bent in the
applied load direction.
The test results recorded in this report apply only to the sample(s) as received and relate only to
those items tested.

3. 20-0775A Pg 3
This report shall not be reproduced, except in full, without written approval from Dayton T. Brown,
Inc.
If you have any questions, please do not hesitate to contact the undersigned at (631) 589-6300 ext.
4571.
Very truly yours,
DAYTON T. BROWN, INC.
Don Landwehrle
Engineer
Warren Halbig
Department Manager
DL:rb

4. 20-0775A
Enclosure 1
Test Equipment List

5. 20-0775AEnc1Pg1
Test equipment utilized for the program reported herein was within its assigned interval of calibration.
Details are on file at Dayton T. Brown, Inc. and will be made available upon request.
417541-01Job Sub:
CAL DUE DATEACCURACYMODEL DTB NO.MANUFACTURERITEM
TEST: PROOF AND ULTIMATE LOAD
CONTROL SYSTEM, AERO ST 32
CH. CONTROL, 64 CH. DATA
MTS 10-228493.10/793.00 10/10/2021Mfr
TAPE MEASURE, 25' STANLEY 15-7833-725 05/23/2021± 1/16"
LOAD CELL, 2K LB 5/8 X 18
THREAD
INTERFACE 62-7691210-AF-2K-B 04/03/2022± 0.1% of F.S.
LEVEL, DIGITAL 10" MULTI-
FUNCTION WITH LASER TRAC
CRAFTSMAN 67-22320.48292 09/26/2021± 0.1°

6. 20-0775A
Enclosure 2
Photographs

7. 20-0775A Enc 2 Pg 1
Photo 1 – File No. PA300968
Test Setup with Aluminum Shoe
Photo 2 – File No. PA300986
Typical Test Setup with Steel 90° Angle

8. 20-0775A Enc 2 Pg 2
Photo 3 – File No. PA300990
Serial No. NB1C-W-3 Ultimate Test Deformation

9. 20-0775A
Enclosure 3
Representative Proof Load Graphs

10. 20-0775A Enc 3 Pg 1
-50
0
50
100
150
200
250
300 11:48:44
11:48:50
11:48:56
11:49:02
11:49:08
11:49:14
11:49:20
11:49:26
11:49:32
11:49:38
11:49:44
11:49:49
11:49:55
11:50:01
11:50:07
11:50:13
11:50:19
11:50:25
11:50:31
11:50:37
11:50:43
11:50:49
11:50:55
11:51:01
11:51:07
11:51:13
11:51:19
11:51:25
11:51:31
11:51:37
11:51:43
11:51:49
11:51:55
11:52:00
Load(LBF)
Time Stamp
NB1C-S Sample Data
CONTROL
FEEDBACK

11. 20-0775A Enc 3 Pg 2
-50
0
50
100
150
200
250
300 13:54:46
13:54:40
13:54:38
13:54:44
13:54:49
13:54:55
13:55:00
13:55:06
13:55:11
13:55:17
13:55:23
13:55:28
13:55:34
13:55:39
13:55:45
13:55:50
13:55:56
13:56:01
13:56:07
13:56:13
13:56:18
13:56:24
13:56:29
13:56:35
13:56:40
13:56:46
13:56:52
13:56:57
13:57:03
13:57:08
13:57:14
13:57:19
13:57:25
13:57:31
Load(LBF)
Time Stamp
NB1S-S Sample Data
CONTROL
FEEDBACK

12. 20-0775A Enc 3 Pg 3
-50
0
50
100
150
200
250
300 14:32:53
14:32:47
14:32:41
14:32:35
14:32:29
14:32:23
14:32:17
14:32:11
14:32:05
14:31:59
14:31:53
14:31:47
14:31:41
14:31:35
14:31:29
14:31:23
14:31:17
14:31:11
14:31:04
14:30:58
14:30:52
14:30:46
14:30:40
14:30:34
14:30:28
14:30:22
14:30:16
14:30:10
14:30:04
14:29:58
14:29:52
14:29:46
14:29:40
14:29:34
Load(LBF)
Time Stamp
NB1C-W Sample Data
CONTROL
FEEDBACK